基于有限元单侧上颌骨缺损修复材料的生物力学研究

发布时间：2018-05-21 01:24

本文选题：单侧上颌骨 + 有限元分析　；参考：《医用生物力学》2014年01期

【摘要】：目的采用三维有限元分析方法研究不同修复体材料对上颌骨单侧缺损修复的生物力学影响。方法利用医学图像处理软件MIMICS重建单侧缺损上颌骨模型,采用镜像技术生成修复体模型,经模型处理最终建立单侧缺损修复的上颌骨有限元模型及健康上颌骨有限元模型,并模拟口腔咬合状态下上颌骨受力状态。结果不同修复材料修复上颌骨的最大应力都集中在与颧骨连接的上颌骨边缘,即颧小肌与提口角肌附着位置。利用三磷酸钙(TCP)复合材料修复后,修复侧的上颌骨边缘应力最小为8.471 MPa;利用羟基磷灰石(HA)修复后,修复侧的上颌骨边缘应力最大,达到17.55 MPa。结论不同修复材料对修复后上颌骨健侧受力影响不显著,对修复侧受力影响较大。弹性模量的大小可作为临床上用于缺损上颌骨修复的材料选择依据。
[Abstract]:Objective to study the biomechanical effects of different prostheses on unilateral maxillary defects by three dimensional finite element analysis. Methods the unilateral maxillary defect model was reconstructed by medical image processing software MIMICS, and the reconstruction model was created by mirror image technique. The finite element model of unilateral defect repair and the healthy maxillary finite element model were established after the model processing. The maxillary force was simulated under oral occlusal condition. Results the maximum stress of maxilla repaired with different restorative materials was concentrated on the edge of maxilla connected with zygomatic bone, that is, the attachment position between zygomatic minor muscle and levator muscle. After repairing with calcium triphosphate (TCP) composite material, the marginal stress of maxilla in the repaired side was 8.471 MPA, and that in the repaired side was 17.55 MPA after the repair with hydroxyapatite (HA). Conclusion the effects of different restorative materials on the strength of the healthy side of the maxilla after repair were not significant, but the effects on the side of the repair were significant. The elastic modulus can be used as a material selection basis for maxillary defect repair.
【作者单位】：解放军总医院口腔科;第二炮兵总医院口腔科;北京航空航天大学生物与医学工程学院生物力学与力生物学教育部重点实验室;
【基金】：国家自然科学基金资助项目(11202017) 教育部博士点新教师基金项目(20121102120039) 北京市自然科学基金项目(7133245)
【分类号】：R318.08

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